Bonjour,
a²-b² = (a-b) (a+b)
A= ( x-4) (x+4)
B= (1-y) (1+y)
C= ( 10x-3) (10x+3)
D= ( 6-9z) ( 6+9z)
fais l' autre:
4x² -> 2x
25 -> 5
F= (x+3 -4) (x +3 +4)
= (x-1) ( x+7)
G= ( 2x+1 -5)( 2x+1+5)
= (2x-4) ( 2x+6)
H= (3i+7 -i -5) ( 3i+7 + i+5)
= (2i +2) ( 4i +12)
